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Over the last six decades, the interaction of floating solid bodies with water waves has received increasing attention from researchers and engineers. Water waves and floating solid bodies can mutually influence each other, depending on the physics of problem. To efficiently design marine structures and accurately predict the wave propagation pattern at covered seas, engineers and scientists require a thorough understanding of the wave-structure interaction. A floating solid body is likely to attenuate the energy of waves and alter the phase speed at which waves propagate. Water waves, on the other hand, can induce motions to and displace the solid object across the sea domain. The wave-body interaction primarily depends on the mechanical behaviour of the floating object (e.g., rigid, elastic, or viscoelastic condition). If the solid body is very thin, the interaction is most likely to be nonlinear, and the body can flex under the force generated by water waves. As such, shear stresses may emerge and dampen the wave energy, and solid body may experience nonlinear motions. Consequently, theoretical models, which are often developed on the basis of potential flow and linear elastic theories, may not be able to reliably predict the outcomes of the wave-body interaction problems. To address this limitation, the fluid-solid body problems should be solved by coupling Computational Fluid Dynamics (CFD) and Computational Solid Dynamic (CSD) models and considering viscous fluids with nonlinear solid motions. In the present thesis, numerical simulations are performed to analyse the interaction of water waves with thin floating solid bodies using coupled CFD and CSD models of OpenFoam, which is an open source numerical toolbox containing various developed solvers for continuum mechanics problems. The primary aim is to determine the ability of the numerical models in simulating the wave-structure interaction problems, and to gain insights into the energy dissipation and dispers